Replace the fuel pump relay to restore fuel pump operation on a 2012-2018 Jeep Wrangler 3.6L V6, involving relay location identification and replacement in the power distribution center.

Warnings

Tools required

Parts

• Fuel pump relay × 1 — Mopar 04692173 or equivalent micro relay
• Dielectric grease (optional) × 1 — Use OEM specification

Preparation

1. Park vehicle on level ground and engage parking brake
2. Turn ignition to OFF position and remove key
3. Allow engine to cool completely if recently operated
4. Open hood and secure with prop rod
5. Locate Power Distribution Center (PDC) on driver side of engine compartment near firewall - it is a black plastic box with removable cover

Procedure

1. 1

   Access the Power Distribution Center
   Release the two locking tabs on the front of the PDC cover by pressing down and pulling forward simultaneously. Remove the cover completely to expose the relays and fuses. There is a relay/fuse diagram on the underside of the cover.
2. 2

   Identify the fuel pump relay location
   Refer to the diagram on the underside of the PDC cover. The fuel pump relay is typically labeled as 'Fuel Pump' and is located in cavity M15 or M16 depending on production date. It is a micro relay (smaller rectangular black relay). Cross-reference the diagram with the cavity positions in the PDC to ensure correct identification. Do NOT remove any other relays or fuses.
3. 3

   Remove the old fuel pump relay
   Grasp the fuel pump relay firmly between thumb and forefinger. Pull straight upward with steady, even pressure to extract the relay from its socket. The relay has blade terminals that friction-fit into the socket. If relay is difficult to remove, use needle-nose pliers to grip the relay body (not the terminals) and pull straight up. Avoid rocking side-to-side which can damage socket terminals.
4. 4

   Inspect the relay socket
   Examine the socket terminals in the PDC cavity for corrosion, burning, or damage. Terminals should be clean, bright metal without discoloration. If terminals show heat damage (melting, blackening), professional diagnosis is required as this indicates an underlying electrical fault. Use compressed air or a clean dry cloth to remove any debris from the socket. Do not use contact cleaner unless terminals show light corrosion.
5. 5

   Verify relay compatibility
   Compare the old relay to the new replacement. Both relays must have identical terminal configuration, physical dimensions, and amperage rating (typically printed on relay body). The fuel pump relay is a standard micro relay with 4 or 5 blade terminals. Relay amperage is typically 20-40A. If new relay does not exactly match old relay configuration, do not install it.
6. 6

   Install the new fuel pump relay
   Optional: Apply a thin film of dielectric grease to the relay blade terminals to prevent corrosion. Align the new relay with the socket cavity, ensuring the terminal blades are oriented correctly with the socket openings. Press the relay firmly straight down into the socket until it seats completely flush with the PDC housing. You should feel positive engagement when relay bottoms out. Verify relay cannot be pulled out easily by hand.
7. 7

   Reinstall PDC cover
   Position the PDC cover over the housing, aligning the rear hinge tabs first. Press down firmly on the front of the cover until both locking tabs click into place. Tug gently on the front edge to verify cover is secured. Ensure no wires or relay terminals are pinched under the cover edges.

Reassembly

1. Verify PDC cover is completely latched with both tabs engaged
2. Ensure no tools or parts are left in engine compartment
3. Close hood securely

Verification

• Turn ignition key to ON position (do not start engine). Listen for fuel pump priming - a 2-3 second buzzing/whirring sound from rear of vehicle indicates pump is receiving power through the relay
• If fuel pump primes audibly, attempt to start engine. Engine should start normally within 3-5 seconds of cranking
• If engine starts, allow it to idle for 2-3 minutes and verify smooth operation without stumbling or stalling
• If fuel pump does not prime or engine does not start, turn ignition OFF immediately. Verify relay is fully seated and installed in correct cavity. If problem persists, check fuel pump fuse in PDC and consider professional diagnosis
• Monitor engine operation during first test drive. Fuel delivery should be consistent without hesitation or power loss

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